First switch of your phone, while your s4 is in the power down state press and hold Volume up + Home button and press "Power" button. Hold the buttons until the phone vibrates, now you will see a screen with android logo, now please release all buttons. After this you will get a menu with the option, "Wipe data/Factory reset". You can toggle through the menu using Volume Down button, and you can use "Power" button to select an option. Now select the option and press power button.

Your phone will reboot after successful hard reset, if it's not rebooted then try the option "reboot system now".

2. Hard Resetting Samsung Galaxy S4 from settings menu

Follow this path: Settings->Account->Back up and Reset->Factory Data Reset->Erase Everything.

My Samsung Galaxy S4 keeps showing a message that says "Unable to Detect SIM Card" & it will tell me to restart the device. It constantly tells me almost every few minutes. I have also already changed my SIM card & uninstall apps that may be the cause, it still says the same message. Will this hard reset my phone?

My Samsung Galaxy S4 keeps showing a message that says "Unable to Detect SIM Card" & it will tell me to restart the device. It constantly tells me almost every few minutes. I have also already changed my SIM card & uninstall apps that may be the cause, it still says the same message. Will this hard reset my phone?

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